record-hot-year-2015

The analysis estimates that the 2015 global temperature anomaly was 1.05ºC above the 1850–1900 pre-industrial average. This warming is primarily attributed to anthropogenic forcing, with smaller contributions from El Niño and solar activity. The year 2015 is identified as likely the first to cross both the 1ºC temperature anomaly and the 400 ppm CO2 thresholds.

• The global temperature anomaly for 2015 is estimated at 1.05ºC (1.89ºF) above the 1850–1900 pre-industrial average, marking the first year to exceed both the 1ºC temperature anomaly and the 400 parts per million (ppm) CO2 thresholds.
• Of the 1.05ºC temperature increase, approximately 1.0ºC is attributed to anthropogenic forcing, while solar activity contributed about 0.02ºC (0.04ºF).
• El Niño contributed between 0.05ºC (0.09ºF) and 0.1ºC (0.18ºF) to the 2015 warming, with its influence on global mean temperature expected to be greater in 2016 due to a delayed response.

APA

World Weather Attribution (2015). record-hot-year-2015. https://www.worldweatherattribution.org/record-hot-year-2015/

Chicago

World Weather Attribution. record-hot-year-2015. 2015. https://www.worldweatherattribution.org/record-hot-year-2015/.

Wikipedia

{{cite report |author=World Weather Attribution |title=record-hot-year-2015 |date=24 November 2015 |url=https://www.worldweatherattribution.org/record-hot-year-2015/ |access-date=23 October 2026 |via=Climate Insights Directory}}

BibTeX

@techreport{worldweatherattribution2015recordhotyear2015, author = {{World Weather Attribution}}, title = {{record-hot-year-2015}}, institution = {World Weather Attribution}, year = {2015}, month = nov, url = {https://www.worldweatherattribution.org/record-hot-year-2015/}, urldate = {2026-10-23}, note = {Indexed by Climate Insights Directory} }